XML 28 R80.htm IDEA: XBRL DOCUMENT
v2.4.0.8

COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 12 Months Ended | 36 Months Ended |  |  | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 site | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2007 | Sep. 30, 2005 | Nov. 26, 2013 Subsequent Event [Member] | Sep. 30, 2013 Three-year period ending September 30, 2016 [Member] | Sep. 30, 2013 From October 1, 2016 [Member] | Sep. 30, 2013 MF Global Inc [Member] | Jun. 30, 2010 Laclede Gas [Member] | Sep. 30, 2013 Missouri Gas Energy (MGE) [Member] | Sep. 30, 2013 Vehicles and Power Operated Equipment Leases [Member] Laclede Gas [Member]
Commitments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated capital expenditures, next fiscal year |  | $ 175,000,000 |  |  |  |  |  |  |  |  |  |  |
Approximate contract amount of project |  | 1,500,000 |  |  |  |  |  |  |  |  |  |  |
Estimated capital expenditures for non-regulated subsidiaries |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |
Minimum total payments required for natural gas contracts |  | 981,000,000 |  |  |  |  |  |  |  |  |  |  |
Leases and Guarantees [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Additional years available for lease renewal (in years) |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Office headquarters lease rental aggregate expense |  | 1,000,000 | 900,000 | 900,000 |  |  |  |  |  |  |  | 600,000 |
Annual minimum rental payments | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Minimum rental costs obligations - current fiscal year |  |  |  |  |  |  |  |  |  |  |  |  | 2,700,000
Minimum rental costs obligations - due in two years |  |  |  |  |  |  |  |  |  |  |  |  | 1,800,000
Minimum rental costs obligations - due in three years |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000
Minimum rental costs obligations - due in four years |  |  |  |  |  |  |  |  |  |  |  |  | 400,000
Minimum rental costs obligations - due in five years |  |  |  |  |  |  |  |  |  |  |  |  | 100,000
Outstanding mortgage loans incurred in connection with various real estate ventures with general partners |  | 1,600,000 |  |  |  |  |  |  |  |  |  |  |
Contingencies and Indemnifications [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of former manufactured gas plant (MGP) sites in Missouri |  | 3 |  |  |  |  |  |  |  |  |  |  |
Number of former manufactured gas plant (MGP) sites in Shrewsbury, Missouri |  | 1 |  |  |  |  |  |  |  |  |  |  |
Number of former manufactured gas plant (MGP) sites in the City of St. Louis |  | 2 |  |  |  |  |  |  |  |  |  |  |
Minimum cost estimate for a one-time contractual transfer of risk |  |  |  |  |  | 5,800,000 |  |  |  |  |  |  |
Maximum cost estimate for a one-time contractual transfer of risk |  |  |  |  |  | 36,300,000 |  |  |  |  |  |  |
Original proposed disallowance amount related to recovery of purchased gas costs |  |  |  |  | 6,000,000 |  |  |  |  |  |  |  |
Revenue sharing agreements, Company's net margin amount subject to reduced sharing percentage |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Revenue sharing agreements, Company's net margin amount subject to reduced sharing percentage, Company's percentage share |  | 15.00% |  |  |  |  |  | 0.00% | 15.00% |  |  |  |
Notice of employment related violations issued to company, applicable period |  |  |  |  |  |  |  |  |  |  | 2 years |  |
Amount remaining on deposit with a brokerage firm for Laclede Gas |  |  |  |  |  |  | 200,000 |  |  |  |  |  |
Amount remaining on deposit with a brokerage firm for Laclede Energy Resources, Inc. |  |  |  |  |  |  | 100,000 |  |  |  |  |  |
Percentage of deposits recovered from bankrupt entity |  |  |  |  |  |  |  |  |  | $ 0.98 |  |  |

X
- Definition The additional number of years available for lease renewal. + References No definition available. + Details
Name: | lg_Additionalyearsavailableforleaserenewal
Namespace Prefix: | lg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount on deposit with brokerage firm that filed for Chapter 11 bankruptcy for Laclede Energy Resources, Inc. This amount is frozen in a customer-segregated account pending final resolution. + References No definition available. + Details
Name: | lg_AmountRemainingOnDepositWithBrokerageFirmForLacledeEnergyResourcesInc
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount on deposit with brokerage firm that filed for Chapter 11 bankruptcy for Laclede Gas. This amount is frozen in a customer-segregated account pending final resolution. + References No definition available. + Details
Name: | lg_AmountRemainingOnDepositWithBrokerageFirmForLacledeGas
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total estimated amount of capital expenditures. + References No definition available. + Details
Name: | lg_ApproximateAmountOfCapitalExpenditures
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The approximate amount that the company is contractually committed to spend on a specified project. + References No definition available. + Details
Name: | lg_ApproximateContractAmountOfProject
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Bankruptcy Claims, Aggregate Percentage of Deposits Recovered from Bankrupt Entity + References No definition available. + Details
Name: | lg_BankruptcyClaimsAggregatePercentageofDepositsRecoveredfromBankruptEntity
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | lg_CommitmentsAbstract
Namespace Prefix: | lg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | lg_ContingenciesAndIndemnificationsAbstract
Namespace Prefix: | lg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated capital expenditures for the current fiscal year. + References No definition available. + Details
Name: | lg_EstimatedCapitalExpendituresForNon-RegulatedSubsidiaries
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | lg_LeasesAndGuaranteesAbstract
Namespace Prefix: | lg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Notice of Employment Related Violations Issued to Company, Applicable Period + References No definition available. + Details
Name: | lg_LossContingencyNoticeofEmploymentRelatedViolationsIssuedtoCompanyApplicablePeriod
Namespace Prefix: | lg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discloses the MoPSC Staff's original proposed disallowance related to purchased gas costs. + References No definition available. + Details
Name: | lg_MopscOriginalProposedDisallowanceRelatedToPurchasedGasCosts
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of manufactured gas plant (MGP) sites in Missouri posing potential environmental liability at St Louis. + References No definition available. + Details
Name: | lg_NumberOfFormerManufacturedGasPlantSitesInCityOfStLouis
Namespace Prefix: | lg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of former manufactured gas plant (MGP) sites in Missouri posing potential environmental liability. + References No definition available. + Details
Name: | lg_NumberOfFormerManufacturedGasPlantSitesInMissouri
Namespace Prefix: | lg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of manufactured gas plant (MGP) sites in Missouri posing potential environmental liability at Shrewsbury. + References No definition available. + Details
Name: | lg_NumberOfFormerManufacturedGasPlantSitesInShrewsburyMissouri
Namespace Prefix: | lg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Revenue Sharing Agreements, Company's Net Margin Amount Subject to Reduced Sharing Percentage + References No definition available. + Details
Name: | lg_RevenueSharingAgreementsCompanysNetMarginAmountSubjecttoReducedSharingPercentage
Namespace Prefix: | lg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue Sharing Agreements, Company's Net Margin Amount Subject to Reduced Sharing Percentage, Company's Percentage Share + References No definition available. + Details
Name: | lg_RevenueSharingAgreementsCompanysNetMarginAmountSubjecttoReducedSharingPercentageCompanysPercentageShare
Namespace Prefix: | lg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The estimated maximum amount of possible loss from the contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyRangeOfPossibleLossMaximum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The estimated minimum amount of possible loss from the contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyRangeOfPossibleLossMinimum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the outstanding balance due under the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
Name: | us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34039-112682 + Details
Name: | us-gaap_OperatingLeasesRentExpenseMinimumRentals
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration